Which one of the following is the best stage to observe the shape, size and number of chromosomes in a cell?
- Interphase
- Prophase
- Metaphase
- Telophase
The Correct Option is C
Solution and Explanation
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Questions Asked in AIIMS exam
Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion (A) : 02 is liberated in the non-cyclic photophosphorylation.
Reason (R) : Liberation of oxygen is due to photolysis of water.
In the light of the above statements, choose the correct answer from the options given below
- AIIMS - 2019
- Photosynthesis in higher plants
- Match the following column I with column II.
- AIIMS - 2019
- cloning
Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion (A) : The Cro-Magnon man was the direct ancestor of the living modern man.
Reason (R) : Cro-Magnon man had slightly prognathous face.
In the light of the above statements, choose the correct answer from the options given below
- AIIMS - 2019
- evolution
- Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion: Orbit of a satellite is within the gravitational field of earth whereas escaping is beyond the gravitational field of earth.
Reason: Orbital velocity of a satellite is greater than its escape velocity.
In the light of the above statements, choose the correct answer from the options given below- AIIMS - 2019
- Gravitation
Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion (A) : In eukaryotes, transcription occurs in nucleus.
Reason (R) : In bacteria, transcription and translation occurs in cytoplasm.
In the light of the above statements, choose the correct answer from the options given below
- AIIMS - 2019
- Transcription
Concepts Used:
Mitosis
Mitosis is a cell division stage of the cell cycle during which DNA in the nucleus cell gets split into two equal chromosome sets. Cell division results in the formation of genetically identical cells with the same number of chromosomes. Mitosis is also known as equational division.
Features of Mitosis:
- In each cycle of cell division, two daughter cells are formed from the parent cell.
- The cell is also known as equational cell division because the chromosome number in the parent cell and daughter cell is the same.
- In plants, mitosis leads to the growth of vegetative parts of the plant like root tip, stem tip, etc.
- Segregation and combination do not occur in this process.
Read Also: Mitosis Stages
Stages of Mitosis are:
- Interphase: Technically, it is not a part of mitosis, however, it is still a crucial process as it leads up to the process of mitosis. Hence, the interphase refers to all the other stages of cell cycle other than mitosis.
- Prophase: It is the first stage of mitosis. It is also the longest phase of mitosis, where the chromatin condenses into chromosomes and the nuclear membrane breaks down (in prometaphase). In animal cells, the centrioles located near the nucleus begin to split and move to the opposite ends of the cell.
- Metaphase: In this phase, the microtubules pull on the chromosomes with equal force, and the chromosome moves to the center of the cell.
- Anaphase: This phase is marked by the splitting of the sister chromatids. These sister chromatids then become the chromosomes of the daughter nuclei.
- Telophase: It is the final phase of mitosis. It begins after the replicated, paired chromosomes are separated and pulled at the opposite ends of the pole.
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